added or immediate (ori) instruction

.gitignore

@@ -0,0 +1 @@
+*.EXE

assembler.rb

@@ -7,7 +7,7 @@ def zero_fill(pos)
 	end
 end
 
-def int(i)
+def word(i)
 	$bytes.push((i & 0x000000ff),
 		(i & 0x0000ff00) >> 8,
 		(i & 0x00ff0000) >> 16,
@@ -21,13 +21,17 @@ def string(s)
 	end
 end
 
+
+
+
+# # # INSTRUCTIONS # # #
 def jmp(addr)
 	# TODO: this probs wont show up since we have < 3mb of ram but
 	# we can't jump to an address with a different 4 most significant bits
 	raise "jmp addr must be 4 byte aligned" if addr % 4 != 0
 	op = 0b0000_1000_0000_0000_0000_0000_0000_0000
 	op = op | ((addr >> 2) & 0b11_11111111_11111111_11111111)
-	int op
+	word op
 end
 
 def jal(addr)
@@ -35,43 +39,117 @@ def jal(addr)
 	raise "jmp addr must be 4 byte aligned" if addr % 4 != 0
 	op = 0b0000_1100_0000_0000_0000_0000_0000_0000
 	op = op | ((addr >> 2) & 0b11_11111111_11111111_11111111)
-	int op
+	word op
 end
 
+# load upper immediate
+# NOTE: val will be shifted left by 16
+def lui(val, dest)
+	#      oooooo ----- ttttt iiiiiiiiiiiiiiii
+	op = 0b001111_00000_00000_0000000000000000
+	op |= 0xffff & val
+	op |= (0b11111 & dest) << 16
+	word op
+end
+
+# shift right logical
+def srl(src, amt, dest)
+	#      oooooo ----- sssss ddddd hhhhh oooooo
+	op = 0b000000_00000_00000_00000_00000_000010
+	op |= (src & 0b11111) << 16
+	op |= (amt & 0b11111) << 6
+	op |= (dest & 0b11111) << 11
+	word op
+end
+
+# or immediate
+def ori(src, bits, dest)
+	#      oooooo sssss ddddd iiiiiiii iiiiiiii
+	op = 0b001101_00000_00000_00000000_00000000
+	op |= (src & 0b11111) << 21
+	op |= (bits & 0xffff)
+	op |= (dest & 0x11111) << 16
+	word op
+end
+
+
+
+
+# # # PSEUDO-INSTRUCTIONS # # #
 def nop
-	int 0x00000000
+	word 0x00000000
 end
 
-$base_addr = 0x80010000 # 0x10000 # 0x80010000
 
+
+
+# this is a terrible idea and im doing it
+#$labels = {}
+#def method_missing(m, *args)
+#	puts m.to_s
+#	super
+#end
+
+
+# # # CONSTANTS # # #
+$base_addr = 0x80010000 # 0x10000 # 0x80010000
+$file_size = 0x800
+$gp0 = 0x1F801810
+
+# # # EXE HEADER # # #
 string "PS-X EXE"
 zero_fill 0x00f
-int $base_addr # initial pc
+word $base_addr # initial pc
-int 0x00000000 # initial GP/R28
+word 0x00000000 # initial GP/R28
-int $base_addr # destintation address in RAM
+word $base_addr # destintation address in RAM
-int 0x800 # file size excluding header (must be N * 0x800)
+word $file_size # file size excluding header (must be N * 0x800)
-int 0x00000000 # Unknown/Unused
+word 0x00000000 # Unknown/Unused
-int 0x00000000 # Unknown/Unused
+word 0x00000000 # Unknown/Unused
-int 0x00000000 # Memfill start address
+word 0x00000000 # Memfill start address
-int 0x00000000 # Memfill size in bytes
+word 0x00000000 # Memfill size in bytes
-int 0x801ffff0 # Initial SP/R29 & FP/R30 Base
+word 0x801ffff0 # Initial SP/R29 & FP/R30 Base
-int 0x00000000 # Initial SP/R29 & FP/R30 Offs
+word 0x00000000 # Initial SP/R29 & FP/R30 Offs
 zero_fill 0x4b # Reserved for A(43h) Function
 # Ascii marker would go here
 zero_fill 0x7ff
+$exe_header = $bytes[0..]
+$bytes = []
 
-# code
+
+
+
+# # # PROGRAM CODE # # #
+nop ; jmp $base_addr + 16 ; nop ; word 0xdeadbeef
+
+# ops should always be in format of
+# src [args] -> dest
+
+lui $gp0 >> 16, 1
+ori 1, $gp0, 1
+
+nop ; nop ; nop ; nop
+nop ; nop ; nop ; nop
+nop ; nop ; nop ; nop
+nop ; nop ; nop ; nop
+
+jmp $base_addr
 nop
-nop
+
-jal $base_addr
+
-nop # nop (is always exec'd bc mips)
+
+
+
+
 
 string "this is a test lol"
-int 0xFFAAFFAA
 
-zero_fill 0xfff
+
+
+
+zero_fill $file_size - 1
 
 f = File.new "LOADTHIS.EXE", "wb"
+f.write $exe_header.pack("C*")
 f.write $bytes.pack("C*")
 f.close